LE1234-C 25.4 mm Dia. N-BK7 Positive Meniscus Lens; EFL=100mm 1050-1700nm
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Concave)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- 100 mm
- BFL
- 95.9 mm
- R1
- 32.1 mm
- R2
- 82.2 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5167984379050088
- λ
- 587.6 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
LE1234-C 25.4 mm Dia. N-BK7 Positive Meniscus Lens; EFL=100mm 1050-1700nm
The LE1234-C is a high-quality spherical lens from Thorlabs, featuring a positive meniscus design with a diameter of 25.4 mm. This lens is made from N-BK7, a popular glass type known for its excellent optical properties, particularly in the infrared region. The lens has a focal length (EFL) of 100mm, making it suitable for a wide range of applications that require moderate magnification.
The lens's geometry is characterized by a convex-concave shape, with radii of curvature of 32.1mm and 82.2mm for the front and back surfaces, respectively. This design results in a back focal length (BFL) of 95.9mm. The lens has a central thickness of 3.6mm and an edge thickness of 2mm, providing robustness and durability.
The LE1234-C is coated with Thorlabs' proprietary anti-reflection coating, THo C Bbar, on both the front and back surfaces. This coating is designed to reduce surface reflections and increase transmission in the 1050-1700nm wavelength range, making the lens ideal for use in infrared applications.